ADA4351-2ACPZ-RL

Overview

The ADA4351-2 is a compact, dual-channel precision programmable gain transimpedance amplifier (PGTIA) designed for high-accuracy current measurement. It integrates two low off-leakage switches per channel and supports gains from 200 Ω to beyond 10 MΩ using two user-selectable external resistors. The device operates on single supplies (+2.7 V to +5.5 V) or dual supplies (±1.85 V to ±2.75 V). Key specifications include a maximum offset voltage of ±100 μV at 25°C, input bias current of ±9 pA, and a gain bandwidth product of 8.5 MHz. It features a 16-lead LFCSP package measuring 3 mm × 3 mm.

Feature Summary

• Integrates proprietary low off-leakage switches arranged in a Kelvin configuration to eliminate gain error caused by switch resistance.
• Provides separate analog and digital supply domains with integrated logic level shifting for flexible ground-referenced control.
• Features internally compensated architecture with a 3 pF internal feedback capacitor to simplify design and reduce PCB footprint.
• Offers rail-to-rail output stage capable of directly driving 16-bit precision analog-to-digital converters.

Applications

• Precision current to voltage conversion
• Photodetector interface and amplification
• Optical networking equipment
• Instrumentation including spectroscopy and chromatography

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and temperature grade. Confirm that the selected variant matches the required operational voltage range and pinout configuration for your target application before finalizing procurement.

Selection Notes

Select this component when system design requires minimizing PCB area while maintaining high precision over a wide dynamic range. It is suitable for applications demanding low offset drift and direct ADC interfacing without additional discrete switching components.

Part Context

This device belongs to Analog Devices' portfolio of precision signal chain solutions. It addresses the need for compact analog front-end modules by combining amplification and switching functions into a single monolithic die, replacing traditional discrete op-amp and switch assemblies.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.